A pragmatic approach to semantic repositories benchmarking

The aim of this paper is to benchmark various semantic repositories in order to evaluate their deployment in a commercial image retrieval and browsing application. We adopt a two-phase approach for evaluating the target semantic repositories: analytical parameters such as query language and reasoning support are used to select the pool of the target repositories, and practical parameters such as load and query response times are used to select the best match to application requirements. In addition to utilising a widely accepted benchmark for OWL repositories (UOBM), we also use a real-life dataset from the target application, which provides us with the opportunity of consolidating our findings. A distinctive advantage of this benchmarking study is that the essential requirements for the target system such as the semantic expressivity and data scalability are clearly defined, which allows us to claim contribution to the benchmarking methodology for this class of applications

Web Mining to Create Semantic Content: A Case Study for the Environment

Part 7: First Mining Humanistic Data Workshop (MHDW 2012)International audienceIn this study, the goal is multifold. At first we present a summarized review of terms and facts regarding the branch of ecoinformatics, web mining and the semantic web. In Section 2 we provide some related work derived from the current literature upon the web mining and the production of semantic content. The main part of our work follows presenting a notional model for building semantic content through 2-level web mining. This is achieved in web sites containing environmental data. We conclude mentioning the importance of this contribution from different points of view

Semantically enriching VGI in support of implicit feedback analysis

Paper presented at the 10th International Symposyum on Web and Wireless Geographical Information Systems, 3-4 March 2011, Kyoto, JapanIn recent years, the proliferation of Volunteered Geographic Information (VGI) has enabled many Internet users to contribute to the construction of rich and increasingly complex spatial datasets. This growth of geo-referenced information and the often loose semantic structure of such data have resulted in spatial information overload. For this reason, a semantic gap has emerged between unstructured geo-spatial datasets and high-level ontological concepts. Filling this semantic gap can help reduce spatial information overload, therefore facilitating both user interactions and the analysis of such interaction. Implicit Feedback analysis is the focus of our work. In this paper we address this problem by proposing a system that executes spatial discovery queries. Our system combines a semantically-rich and spatially-poor ontology (DBpedia) with a spatially-rich and semantically-poor VGI dataset (OpenStreetMap). This technique differs from existing ones, such as the aggregated dataset LinkedGeoData, as it is focused on user interest analysis and takes map scale into account. System architecture, functionality and preliminary results gathered about the system performance are discussed.Science Foundation Ireland12M embargo - release after 15/02/2012 ti, ke - kpw4/11/1

William Blake and America: Freedom and Violence in the Atlantic World

In this article, I consider the absence of a general readership of William Blake's poetry in nineteenth-century Britain and compare that neglect to the American Transcendentalists' reading of Songs of Innocence and Experience (1794) in the 1840s. The American interest in Blake's poetry is complemented by his fascination with the events in the Atlantic World in the years culminating in the American War of Independence. I will offer a reading of Blake's America: a Prophecy (1793) showing that the Civil War fulfilled his prophecy of inevitable future conflict. This is developed first by considering Ralph Waldo Emerson's changing responses to slavery and race during the turbulent middle decades of the century, and then by addressing Walt Whitman's attempt to negotiate postbellum America. This negotiation, I argue, results in the emergence of those two powerfully conflicting strains in his mature poetry: emancipatory fervour and simultaneous despair at the violence intrinsic in liberty